Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Canon 80D is significantly lighter (220g ) than the Canon 5D MIII which may become a big advantage especially on long walking trips.

Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since Canon 5D MIII has a Full frame sensor and Canon 80D has a smaller APS-C sensor, Canon 80D's lenses for a similar focal length and aperture will generally be lighter and smaller than the Canon 5D MIII lenses.

As seen above, Canon 5D MIII has a 2.6x Larger sensor area than Canon 80D. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.

What types of Photography are Canon 80D and Canon 5D MIII Good for?

In this section, we rank and compare Canon 80D and Canon 5D MIII for five different photography types in order to make your decision process easier in case you are specifically interested in one or more of these areas.

Number of available lenses is a big decision factor while choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that Canon 80D has an advantage over Canon 5D MIII There are 292 lenses for Canon 80D's Canon EF/EF-S mount, on the other hand there are only 244 lenses for Canon 5D MIII's Canon EF lens mount.

Another important factor is the availability of image stabilization. None of these bodies have sensor based image stabilization so you have to buy lenses with Optical stabilization feature. Currently there are 91 lenses for Canon EF/EF-S mount and 65 lenses for Canon EF mount with IS.

You may have already made your decision about which camera suits better for your needs and your budget so far but in case you wonder how we rated Canon 80D and Canon 5D MIII, below you can find their scores in five different aspects.
Our Decision Algorithm dynamically scores cameras using 63 different specs, current price and DxO Mark scores (where possible) in order to make a more objective and consistent comparison.

Here is a summary of how Canon 80D and Canon 5D MIII scores compare:

Canon 80D

Imaging

Features

Value

Portability

Overall

Ranked #17 out of 92 in Mid-size SLR camerasRanked #34 out of 1131 in all Cameras

Canon 5D MIII

Imaging

Features

Value

Portability

Overall

Ranked #26 out of 92 in Mid-size SLR camerasRanked #64 out of 1131 in all Cameras

Canon 80D has a higher Overall Score than the Canon 5D MIII. It also has more features, more compact body and offers higher value for the money. But there is one area that 80D trails behind the 5D MIII: Imaging. If image quality is the most important aspect in a camera, choose the Canon 5D MIII. If not, we recommend the Canon 80D.